'\" t
.\"     Title: suauth
.\"    Author: Marek Micha\(/lkiewicz
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: 2020-01-23
.\"    Manual: 文件格式和转化
.\"    Source: shadow-utils 4.8.1
.\"  Language: Chinese Simplified
.\"
.TH "SUAUTH" "5" "2020-01-23" "shadow\-utils 4\&.8\&.1" "文件格式和转化"
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.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
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.el       .ds Aq '
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.nh
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.\" * MAIN CONTENT STARTS HERE *
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.SH "名称"
suauth \- 详细的 su 控制文件
.SH "大纲"
.HP \w'\fB/etc/suauth\fR\ 'u
\fB/etc/suauth\fR
.SH "描述"
.PP
The file
/etc/suauth
is referenced whenever the su command is called\&. It can change the behaviour of the su command, based upon:
.sp
.if n \{\
.RS 4
.\}
.nf
      1) the user su is targeting
    
.fi
.if n \{\
.RE
.\}
.PP
2) 执行 su 命令的用户 (或者他可能属于的组)
.PP
文件格式为：以 # 开头的行视为注视，并被忽略；
.sp
.if n \{\
.RS 4
.\}
.nf
      to\-id:from\-id:ACTION
    
.fi
.if n \{\
.RE
.\}
.PP
Where to\-id is either the word
\fIALL\fR, a list of usernames delimited by "," or the words
\fIALL EXCEPT\fR
followed by a list of usernames delimited by ","\&.
.PP
from\-id is formatted the same as to\-id except the extra word
\fIGROUP\fR
is recognized\&.
\fIALL EXCEPT GROUP\fR
is perfectly valid too\&. Following
\fIGROUP\fR
appears one or more group names, delimited by ","\&. It is not sufficient to have primary group id of the relevant group, an entry in
\fB/etc/group\fR(5)
is necessary\&.
.PP
动作只可以使用如下当前支持的选项。
.PP
\fIDENY\fR
.RS 4
su 的尝试在询问密码之前就被拒绝。
.RE
.PP
\fINOPASS\fR
.RS 4
su 尝试自动成功，而且不询问密码。
.RE
.PP
\fIOWNPASS\fR
.RS 4
为了成功执行 su，用户必须提供自己的密码。将会提示他们这样。
.RE
.PP
注意，有三个用冒号分割的字段。冒号旁边不能有空格。也请注意，这个文件会被一行一行地依次检查，会使用第一个可用的规则，而不会继续检查文件。这可以让系统管理员使系统尽量符合其期望。
.SH "示例"
.sp
.if n \{\
.RS 4
.\}
.nf
      # sample /etc/suauth file
      #
      # A couple of privileged usernames may
      # su to root with their own password\&.
      #
      root:chris,birddog:OWNPASS
      #
      # Anyone else may not su to root unless in
      # group wheel\&. This is how BSD does things\&.
      #
      root:ALL EXCEPT GROUP wheel:DENY
      #
      # Perhaps terry and birddog are accounts
      # owned by the same person\&.
      # Access can be arranged between them
      # with no password\&.
      #
      terry:birddog:NOPASS
      birddog:terry:NOPASS
      #
    
.fi
.if n \{\
.RE
.\}
.SH "文件"
.PP
/etc/suauth
.RS 4
.RE
.SH "缺陷"
.PP
可能会有很多潜在问题。文件解析器尤其不能容忍语法错误，不能有无意义的空白符(除了行首和行尾)，并且使用特定的标记分割不同的事情。
.SH "DIAGNOSTICS"
.PP
An error parsing the file is reported using
\fBsyslogd\fR(8)
as level ERR on facility AUTH\&.
.SH "参见"
.PP
\fBsu\fR(1)\&.
